the forum does not accept donations (don't send PM's we do not want your money! it's all free) and the way to get access to the privileged sections is to apply when you have fulfilled the requirements viewtopic.php?f=13&t=34448 and have the patience to wait for evaluation.

All requests get reviewed and will either be accepted or denied in which case you can retry at a later date.

Contribution can also be being active in the community, show interest that you want to learn, contribute what you have learned. If it was useful for you as a beginner it will be useful to the next beginner.